Shares of TD Ameritrade (Nasdaq: AMTD) have fallen in the past three months as well, but only at 15% or half as much as its closest competitor. Overall, AMTD's market cap is 4.5 times larger than ETFC. Comparing a one-year chart between the two stocks, AMTD fell about 15% and ETFC down 45%. But, on a two-year chart, AMTD is up about 10%, a lot better than ETFC's collapse of nearly 40%.

ETFC is expected to report quarterly earnings on July 19, AMTD on July 17.